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Effect of high pressure on the reducibility and dispersion of the active phase of Fischer-Tropsch catalysts

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dc.contributor.authorYunes, Simón
dc.contributor.authorVicente, Miguel Ángel
dc.contributor.authorKorili, Sophia A.
dc.contributor.authorGil Bravo, Antonio
dc.contributor.departmentZientziakeu
dc.contributor.departmentInstitute for Advanced Materials and Mathematics - INAMAT2en
dc.contributor.departmentCienciases_ES
dc.date.accessioned2020-02-18T13:10:02Z
dc.date.available2020-02-18T13:10:02Z
dc.date.issued2019
dc.description.abstractThe effect of high pressure on the reducibility and dispersion of oxides of Co and Fe supported on -Al2O3, SiO2, and TiO2 has been studied. The catalysts, having a nominal metal content of 10 wt.%, were prepared by incipient wetness impregnation of previously calcined supports. After drying at 60 °C for 6 h and calcination at 500 °C for 4 h, the catalysts were reduced by hydrogen at two pressures, 1 and 25 bar. The metal reduction was studied by temperature-programmed reduction up to 750 °C at the two pressures, and the metal dispersion was measured by CO chemisorption at 25 °C, obtaining values between 1% and 8%. The physicochemical characterization of these materials was completed by means of chemical analysis, X-ray diffraction, N2 adsorption-desorption at -196 °C and scanning electron microscopy. The high pressure lowered the reduction temperature of the metal oxides, improving their reducibility and dispersion. The metal reducibility increased from 42%, in the case of Fe/Al2O3 (1 bar), to 100%, in the case of Fe/TiO2 (25 bar).en
dc.description.sponsorshipThis research was jointly funded by the Spanish Ministry of Economy and Competitiveness (AEI/MINECO) and the European Regional Development Fund (ERDF), grant number MAT2016-78863-C2-R. A.G. thanks Santander Bank for funding through the Research Intensification program.en
dc.format.extent8 p.
dc.format.mimetypeapplication/pdfen
dc.identifier.doi10.3390/ma12121915
dc.identifier.issn1996-1944
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/36271
dc.language.isoengen
dc.publisherMDPIen
dc.relation.ispartofMaterials, 2019, 12 (12), 1915en
dc.relation.projectIDinfo:eu-repo/grantAgreement/ES/1PE/MAT2016-78863en
dc.relation.publisherversionhttps://doi.org/10.3390/ma12121915
dc.rights© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.en
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessen
dc.rights.accessRightsAcceso abierto / Sarbide irekiaes
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectFischer-Tropschen
dc.subjectSupported iron oxideen
dc.subjectSupported cobalt oxideen
dc.subjectReducibilityen
dc.subjectDispersionen
dc.titleEffect of high pressure on the reducibility and dispersion of the active phase of Fischer-Tropsch catalystsen
dc.typeinfo:eu-repo/semantics/article
dc.type.versionVersión publicada / Argitaratu den bertsioaes
dc.type.versioninfo:eu-repo/semantics/publishedVersionen
dspace.entity.typePublication
relation.isAuthorOfPublicationc3e28e52-d0f3-4b9d-82a4-6b347c553c64
relation.isAuthorOfPublicationcd12e590-cb42-47d5-a642-f60eeee624ec
relation.isAuthorOfPublication.latestForDiscoveryc3e28e52-d0f3-4b9d-82a4-6b347c553c64

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